matrix-spec/data/event-schemas/examples/m.secret.request.yaml

{
  "type": "m.secret.request",
  "content": {
    "name": "org.example.some.secret",
    "action": "request",
    "requesting_device_id": "ABCDEFG",
    "request_id": "randomly_generated_id_9573"
  }
}